Re: Why chain of snapshots is used in ReorderBufferCommit?

From: Arseny Sher <a(dot)sher(at)postgrespro(dot)ru>
To: Andres Freund <andres(at)anarazel(dot)de>
Cc: pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Why chain of snapshots is used in ReorderBufferCommit?
Date: 2018-03-01 10:12:13
Message-ID: 87tvu0p0jm.fsf@ars-thinkpad
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Andres Freund <andres(at)anarazel(dot)de> writes:

> I don't think that's right. For one there's plenty types of DDL where no
> such locking exists, consider e.g. composite datums where additional
> columns can be added even after such a type is already used by another
> table.

Oh, indeed. Never mind the last paragraph.

--
Arseny Sher
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company

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